/Engine/Plugins/MeshPainting/Source/MeshPaintingToolset/Public/MeshPaintHelpers.h
bool GetPerVertexPaintInfluencedVertices ( [FPerVertexPaintActionArgs](API\Editor\MeshPaint\FPerVertexPaintActionArgs) & InArgs, [TSet](API\Runtime\Core\Containers\TSet)< int32 > & InfluencedVertices )